dev add violation notion

src/main/java/ru/soune/nocopy/dto/file/FileEntityRequest.java

@@ -34,4 +34,10 @@ public class FileEntityRequest {
 
     @JsonProperty("token")
     private String token;
+
+    @JsonProperty("sort_by")
+    private String sortBy;
+
+    @JsonProperty("sort_order")
+    private String sortOrder;
 }

src/main/java/ru/soune/nocopy/dto/file/FileListResponse.java

@@ -30,4 +30,10 @@ public class FileListResponse {
 
     @JsonProperty("page_size")
     private Integer pageSize;
+
+    @JsonProperty("sort_by")
+    private String sortBy;
+
+    @JsonProperty("sort_order")
+    private String sortOrder;
 }

src/main/java/ru/soune/nocopy/dto/file/SortOrder.java

@@ -0,0 +1,25 @@
+package ru.soune.nocopy.dto.file;
+
+import lombok.Getter;
+
+@Getter
+public enum SortOrder {
+    ASC("asc"),
+    DESC("desc");
+
+    private final String value;
+
+    SortOrder(String value) {
+        this.value = value;
+    }
+
+    public static SortOrder fromString(String value) {
+        if (value == null) return ASC;
+        for (SortOrder order : SortOrder.values()) {
+            if (order.value.equalsIgnoreCase(value)) {
+                return order;
+            }
+        }
+        return ASC;
+    }
+}